Strangles is a term used to describe a group of diseases that affect horses. It is caused by the bacterium Streptococcus equi, and is characterized by an infection of the lymph nodes in the horse's neck. Throttles and GARROTES are two methods of controlling a horse's breathing, both of which involve constricting the airways. Throttles are a type of bridle that is placed around the horse's neck and tightened to restrict airflow, while GARROTES are a type of rope or cord that is looped around the horse's neck and pulled tight to restrict breathing. Both of these methods can be used to control a horse's breathing during strangles, allowing the horse to breathe more easily.